Fujifilm Fujinon XC 15-45 mm f/3.5-5.6 OIS PZ review - Vignetting

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Fujifilm Fujinon XC 15-45 mm f/3.5-5.6 OIS PZ

14 January 2019

Arkadiusz Olech

8. Vignetting

High distortion level of this lens means that, on passing from RAW to JPEG file format, images are significantly cropped; it is obvious result in the vignetting category must differ for both formats, no matter whether there is JPEG software vignetting correction or not (and in this case software does correct vignetting).

Let’s glance at thumbnails below in order to assess the JPEG files vignetting level of the tested lens while attached to the Fujifilm X-T2 camera

Fujifilm X-T2, JPEG, 15 mm, f/3.5	Fujifilm X-T2, JPEG, 15 mm, f/5.6

Fujifilm X-T2, JPEG, 28 mm, f/4.5	Fujifilm X-T2, JPEG, 28 mm, f/5.6

Fujifilm X-T2, JPEG, 45 mm, f/5.6	Fujifilm X-T2, JPEG, 45 mm, f/8.0

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At the 15 mm focal length and by f/3.5 aperture the brightness loss in frame corners amounts to 22% (−0.71 EV). If you stop down the lens slightly to f/4.0, the aberration decreases to 20% (−0.66 EV). What’s interesting, by f/5.6 you return to the level of 22% (−0.70 EV) and by f/8.0 the vignetting decreases to 17% (−0.56 EV). It seems these ups and downs are an effect of cropping and selective correction of vignetting at different apertures.

In the middle of the focal length range the light fall-off would be difficult to notice even at the maximum relative aperture as its level is just 8% (−0.24 EV). A very similar situation can be observed at the maximum focal length because the aberration level reaches only 9% (−0.28 EV).

Now let’s check the real performance of the lens by analyzing RAW files.

Fujifilm X-T2, RAW, 15 mm, f/3.5	Fujifilm X-T2, RAW, 15 mm, f/5.6

Fujifilm X-T2, RAW, 28 mm, f/4.5	Fujifilm X-T2, RAW, 28 mm, f/5.6

Fujifilm X-T2, RAW, 45 mm, f/5.6	Fujifilm X-T2, RAW, 45 mm, f/8.0

At a combination of wide angle and f/3.5 aperture, very difficult to correct, the vignetting amounts to as much as 56% (−2.37 EV) and then drops to 51% (−2.06 EV) by f/4.0. By f/5.6 the vignetting decreases further to 40% (−1.46 EV), by f/8.0 it is 36% (−1.27 EV), and by f/11 it decreases to 31% (−1.09 EV).

In the middle of the focal length range there are far less problems. By f/4.5 brightness loss in frame corners is 26% (−0.87 EV) and then it decreases to 20% (−0.64 EV) after applying f/5.6. By f/8.0 you can observe further decrease, this time to a value of 17% (−0.54 EV).

Similar situation can be witnessed at 45 mm where, at the maximum relative aperture, the vignetting gets to 24% (−0.80 EV) and decreases to 18% (−0.57 EV) on stopping down the aperture to f/8.0. By f/11.0 that aberration reaches 16% (−0.50 EV).

Fujifilm X-T2, 15 mm, RAW, f/3.5